Soft seal electric butterfly valve

Abstract

The utility model provides a kind of soft sealing electric butterfly valve, including valve body and the positioning mechanism, valve seat sealing ring, valve plate and driving mechanism being arranged inside it, the positioning mechanism includes first locating plate, second locating plate and locating ring, the first locating plate and second locating plate symmetrical fixed mounting are in the inside top and bottom of valve body. By first locating plate, second locating plate and locating ring etc. Positioning mechanism can be positioned installation to valve seat sealing ring, and by protruding block and installation groove are fixed to valve seat sealing ring, by the cooperation of valve seat sealing ring, sealing plate, sealing strip, arc-shaped groove, sealing pad and extrusion fit with valve plate, it can be closed to the both ends of valve body, ensure the sealing property of the electric butterfly valve, reduce the wear and tear to valve seat sealing ring simultaneously, facilitate to improve the service life of the electric butterfly valve, facilitate to improve the practicality of the electric butterfly valve.

Description

Technical Field

[0001] This utility model relates to the field of electric butterfly valve technology, specifically a soft-seal electric butterfly valve. Background Technology

[0002] An electric butterfly valve is a valve that uses a circular disc as its opening and closing element, which rotates with the valve stem to open, close, and regulate the fluid passage. The disc of an electric butterfly valve is installed in the direction of the pipe's diameter. Electric butterfly valves have two sealing types: resilient soft seal and technical seal. Resilient soft seal electric butterfly valves have better sealing performance, but their lifespan is shorter.

[0003] Chinese utility model patent CN218267276U discloses a soft-seal electric butterfly valve. In use, the device includes a fixed housing and a valve body, with a casing between the valve body and the fixed housing. A gearbox is located inside the casing. A motor with its output shaft pointing downwards is mounted on the top inner wall of the fixed housing. A first rotating shaft is vertically mounted at the output end of the motor. A first gear is fixedly fitted onto the outer wall of the first rotating shaft, and a second gear meshes with one side of the first gear. The second gear is fitted onto a second rotating shaft rotatably connected to the fixed housing. The butterfly flap inside this electric butterfly valve operates with tight pressure between itself and the inner wall of the valve body. During prolonged use, internal friction can cause wear and tear, affecting the valve body's sealing performance.

[0004] Therefore, this utility model provides a soft-seal electric butterfly valve. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a soft-seal electric butterfly valve to solve the problems mentioned in the background. This utility model, through the cooperation of the valve seat sealing ring, sealing plate, sealing strip, arc groove, and sealing gasket, as well as the compression and adhesion with the valve plate, can seal both ends of the valve body, ensuring the sealing performance of the electric butterfly valve, while reducing wear on the valve seat sealing ring, thus improving the service life and practicality of the electric butterfly valve.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a soft-seal electric butterfly valve, comprising a valve body and a positioning mechanism, a valve seat sealing ring, a valve plate, and a driving mechanism disposed therein. The positioning mechanism includes a first positioning plate, a second positioning plate, and a positioning ring. The first and second positioning plates are symmetrically fixedly installed on the top and bottom inner sides of the valve body. The positioning ring is fixedly installed between the rear ends of the first and second positioning plates, corresponding to the interior of the valve body. The valve seat sealing ring is installed between the first and second positioning plates, corresponding to the interior of the valve body, through an interference fit with a protrusion. Sealing plates are fixedly disposed on both sides of the inner wall of the valve seat sealing ring. A sealing strip is fixedly disposed on one side wall of the sealing plate. The valve plate is rotatably mounted on the inner side of the valve seat sealing ring via a valve stem. Arc-shaped grooves are formed on the side walls at both ends of the valve plate, corresponding to the positions of the sealing strips. The two ends of the valve plate are in close contact with the sealing plates, and the sealing strips are installed inside the arc-shaped grooves.

[0007] Furthermore, an installation groove is provided between the two ends of the first positioning plate and the second positioning plate, and the protrusions are symmetrically fixed on the outer walls of both ends of the valve seat sealing ring, and the protrusions are interference-fitted into the interior of the installation groove.

[0008] Furthermore, the valve seat sealing ring is in close contact with the positioning ring, and through holes are provided inside the top and bottom ends of the valve seat sealing ring. The valve stem is inserted and installed inside the through holes and the valve seat sealing ring.

[0009] Furthermore, mounting holes are provided at the top and bottom of the valve body at the corresponding through hole positions. Mounting pipes and fixing pipes are fixedly connected to the outside of the mounting holes at the top and bottom. The two ends of the valve stem are rotatably installed inside the mounting pipes, fixing pipes, and mounting holes.

[0010] Furthermore, a frame-type mounting bracket is fixedly installed at the top of the mounting tube by bolts. The drive mechanism includes a fixed box, a worm gear mechanism, and a transparent cover. The fixed box is fixedly installed on the top of the frame-type mounting bracket by screws. The top of the valve stem passes through the frame-type mounting bracket and is located inside the fixed box.

[0011] Furthermore, a servo motor is fixedly installed on the inner rear wall of the fixed box. The worm gear mechanism includes a worm wheel and a worm. The worm is fixedly installed on the output shaft of the servo motor, and the worm wheel is fixedly installed on the outer side of the upper end of the valve stem corresponding to the inside of the fixed box. The worm wheel and the worm are meshed with each other.

[0012] Furthermore, the transparent cover is fixedly installed on the top of the fixed box, the top of the valve stem is located inside the transparent cover, and a pointer is fixedly installed on one side of the top of the valve stem corresponding to the inside of the transparent cover.

[0013] Furthermore, a sealing gasket is fixedly provided on the side wall of the sealing plate at the position corresponding to the valve plate. The valve seat sealing ring is composed of a soft sealing ring and multiple layers of stainless steel sheets. The top and bottom ends and the outer ring of the valve plate are in close contact with the inner wall of the valve seat sealing ring.

[0014] The beneficial effects of this utility model are as follows: This utility model provides a soft-seal electric butterfly valve. Through positioning mechanisms such as a first positioning plate, a second positioning plate, and a positioning ring, the valve seat sealing ring can be positioned and installed. The valve seat sealing ring is fixed by a protrusion and an installation groove. The valve seat sealing ring, sealing plate, sealing strip, arc-shaped groove, and sealing gasket, along with their compression fit with the valve plate, can seal both ends of the valve body, ensuring the sealing performance of the electric butterfly valve. This also reduces wear on the valve seat sealing ring, extending the service life of the electric butterfly valve and improving its practicality. A servo motor and worm gear mechanism can reduce the speed and rotate the valve stem, thereby rotating the valve plate and facilitating the opening and closing of the electric butterfly valve. A transparent cover and pointer indicate the position of the valve plate and allow for control and observation of the valve plate's opening degree. Attached Figure Description

[0015] Figure 1 This is a structural diagram of a soft-seal electric butterfly valve according to the present invention; Figure 2 This is a front sectional view of a soft-seal electric butterfly valve according to the present invention. Figure 3 This is a cross-sectional view of a soft-seal electric butterfly valve according to the present invention; Figure 4 This is a structural diagram of the valve body of a soft-seal electric butterfly valve according to the present invention; Figure 5 This is a structural diagram of the positioning mechanism of a soft-seal electric butterfly valve according to the present invention; Figure 6 This is a structural diagram of the valve seat sealing ring and valve plate of a soft-seal electric butterfly valve according to this utility model; Figure 7 This is a structural diagram of the valve seat sealing ring of a soft-seal electric butterfly valve according to this utility model; Figure 8 This is a structural diagram of the valve plate of a soft-seal electric butterfly valve according to the present invention; In the diagram: 1. Valve body; 2. Positioning mechanism; 3. Valve seat sealing ring; 4. Valve plate; 5. Mounting tube; 6. Fixing tube; 7. Frame-type mounting bracket; 8. Drive mechanism; 9. Fixing box; 10. Valve stem; 11. Worm gear mechanism; 12. Servo motor; 13. Pointer; 14. Transparent cover; 15. Positioning ring; 16. First positioning plate; 17. Second positioning plate; 18. Protrusion; 19. Sealing plate; 20. Sealing strip; 21. Arc-shaped groove. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] Please see Figures 1 to 8 This utility model provides a technical solution: a soft-seal electric butterfly valve, including a valve body 1 and a positioning mechanism 2, a valve seat sealing ring 3, a valve plate 4, and a driving mechanism 8 disposed therein. The positioning mechanism 2 includes a first positioning plate 16, a second positioning plate 17, and a positioning ring 15. The first positioning plate 16 and the second positioning plate 17 are symmetrically fixedly installed on the top and bottom inner sides of the valve body 1. The positioning ring 15 is fixedly installed between the rear ends of the first positioning plate 16 and the second positioning plate 17 corresponding to the interior of the valve body 1. The valve seat sealing ring 3 is installed between the first positioning plate 16 and the second positioning plate 17 corresponding to the interior of the valve body 1 through an interference fit of a protrusion 18. Sealing plates are fixedly disposed on both sides of the inner wall of the valve seat sealing ring 3. 19. A sealing strip 20 is fixedly provided on one side wall of the sealing plate 19. The valve plate 4 is rotatably mounted on the inner side of the valve seat sealing ring 3 via the valve stem 10. Arc-shaped grooves 21 are provided on the side walls at both ends of the valve plate 4 at positions corresponding to the sealing strip 20. The two ends of the valve plate 4 are in close contact with the sealing plate 19. The sealing strip 20 is installed inside the arc-shaped groove 21. Through the cooperation between the valve seat sealing ring 3 and the sealing plate 19, the rotating valve plate 4 is easily blocked. Furthermore, the cooperation of the sealing plate 19, the arc-shaped groove 21, and the sealing strip 20 seals the valve seat sealing ring 3 and the valve plate 4, and reduces the wear between the valve plate 4 and the valve seat sealing ring 3, thereby improving the service life of the electric butterfly valve and making it highly practical.

[0018] In this embodiment, an installation groove is provided between the two ends of the first positioning plate 16 and the second positioning plate 17. The protrusions 18 are symmetrically fixed on the outer walls of both ends of the valve seat sealing ring 3. The protrusions 18 are interference-fitted into the interior of the installation groove. The valve seat sealing ring 3 is in close contact with the positioning ring 15. Through holes are opened inside the top and bottom ends of the valve seat sealing ring 3. The valve stem 10 is inserted and installed inside the through holes and the valve seat sealing ring 3. Installation holes are opened at the top and bottom ends of the valve body 1 at the positions corresponding to the through holes. The installation tube 5 and the fixing tube 6 are fixedly connected to the outer side of the installation holes at the top and bottom. The two ends of the valve stem 10 are rotatably installed inside the installation tube 5, the fixing tube 6 and the installation holes. The first positioning plate 16, the second positioning plate 17 and the positioning ring 15 facilitate the positioning of the valve seat sealing ring 3. The installation groove can be used to position and limit the protrusions 18, which facilitates the fixing of the valve seat sealing ring 3. The through holes are aligned with the installation holes on the valve body 1, which facilitates the installation of the valve stem 10.

[0019] In this embodiment, a frame-type mounting bracket 7 is fixedly mounted to the top of the mounting tube 5 by bolts. The drive mechanism 8 includes a fixed box 9, a worm gear mechanism 11, and a transparent cover 14. The fixed box 9 is fixedly mounted to the top of the frame-type mounting bracket 7 by screws. The top of the valve stem 10 passes through the frame-type mounting bracket 7 and is disposed inside the fixed box 9. A servo motor 12 is fixedly mounted on the rear wall inside the fixed box 9. The worm gear mechanism 11 includes a worm wheel and a worm. The worm is fixedly mounted on the output shaft of the servo motor 12. The worm wheel is fixedly mounted on the outer side of the upper end of the valve stem 10, corresponding to the inside of the fixed box 9. The worm wheel and the worm... The valve stem 10 is designed to mesh with each other. The transparent cover 14 is fixedly installed on the top of the fixed box 9. The top of the valve stem 10 is located inside the transparent cover 14. A pointer 13 is fixedly installed on one side of the top of the valve stem 10, corresponding to the inside of the transparent cover 14. The servo motor 12 can drive the worm gear to rotate. The meshing action of the worm gear and the worm wheel facilitates the deceleration and rotation of the valve stem 10, which is convenient for subsequent adjustment of the valve plate 4 by rotating the valve stem 10. The transparent cover 14 allows for easy observation of the pointer 13, thereby determining the angle between the valve plate 4 and the valve seat sealing ring 3, as well as the position of the valve plate 4, which facilitates the control of the opening and closing of the electric butterfly valve.

[0020] In this embodiment, a sealing gasket is fixedly provided on the side wall of the sealing plate 19 at the position corresponding to the valve plate 4. The valve seat sealing ring 3 is composed of a soft sealing ring and multiple layers of stainless steel sheets. The top and bottom ends and the outer ring of the valve plate 4 are in close contact with the inner wall of the valve seat sealing ring 3. The cooperation between the sealing gasket and the sealing plate 19 can increase the sealing performance between the valve plate 4 and the sealing plate 19, and also improve the service life of the electric butterfly valve.

[0021] When using this soft-seal electric butterfly valve, the first positioning plate 16, the second positioning plate 17, and the positioning ring 15 are fixedly installed inside the valve body 1 at corresponding positions by welding. The valve seat sealing ring 3 is installed inside the valve body 1 through the cooperation of the protrusion 18 and the mounting groove, and is installed between the first positioning plate 16 and the second positioning plate 17. This allows the valve seat sealing ring 3 to be fixedly installed through the interference fit between the protrusion 18 and the mounting groove, and the valve seat sealing ring 3 is in close contact with the positioning ring 15. The first positioning plate 16 and the second positioning plate 17 can support the valve seat sealing ring 3. The valve body 1 is positioned and installed without compromising its strength. After the valve seat sealing ring 3 is installed, the through holes at the top and bottom of the valve seat sealing ring 3 are aligned with the mounting holes on the valve body 1. The bottom of the valve stem 10 is square, and a square groove is provided inside the valve plate 4. The valve plate 4 is installed inside the valve seat sealing ring 3, with the square groove aligned with the top and bottom through holes. The bottom of the valve stem 10 is inserted into the mounting tube 5 and passes through the through hole, mounting hole, and square groove to be installed inside the fixing tube 6. The bottom of the valve stem 10 and the square groove can mutually limit each other. At the same time, the frame is mounted with bolts. The frame 7 and the fixing box 9 are fixedly installed at the top of the mounting pipe 5; at this time, both ends of the valve plate 4 are pressed and contacted with the sealing plates 19 and rubber gaskets on the front and rear sides, and the sealing strip 20 is installed inside the arc-shaped groove 21, and the electric butterfly valve is in the closed state; through the cooperation of the valve seat sealing ring 3, sealing plate 19, sealing strip 20, arc-shaped groove 21, and sealing gasket, as well as the pressing and fitting with the valve plate 4, both ends of the valve body 1 can be sealed, ensuring the sealing performance of the electric butterfly valve, while reducing the wear on the valve seat sealing ring 3, thus facilitating the improvement of the service life of the electric butterfly valve and extending its lifespan. The servo motor 12 is practical; the servo motor 12 can be controlled by the matching circuit, so that the servo motor 12 can drive the worm gear to rotate. Through the meshing of the worm gear and worm wheel, the valve stem 10 is decelerated and rotated. The valve stem 10 will drive the valve plate 4 to rotate, adjusting the angle between the valve plate 4 and the valve seat sealing ring 3. The valve stem 10 will also drive the pointer 13 to rotate inside the transparent cover 14, so that the position of the valve plate 4 can be determined by the position of the pointer 13. The pointer 13 is parallel to the vertical plane where the valve plate 4 is located, thereby closing and opening the electric butterfly valve.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A soft-seal electric butterfly valve, comprising a valve body (1) and an internally disposed positioning mechanism (2), a valve seat sealing ring (3), a valve plate (4), and a drive mechanism (8), characterized in that, The positioning mechanism (2) includes a first positioning plate (16), a second positioning plate (17), and a positioning ring (15). The first positioning plate (16) and the second positioning plate (17) are symmetrically fixedly installed on the top and bottom of the inner side of the valve body (1). The positioning ring (15) is fixedly installed between the rear ends of the first positioning plate (16) and the second positioning plate (17) corresponding to the interior of the valve body (1). The valve seat sealing ring (3) is installed between the first positioning plate (16) and the second positioning plate (17) corresponding to the valve body through the interference fit of the protrusion (18). Inside (1), sealing plates (19) are fixedly installed on both sides of the inner wall of the valve seat sealing ring (3). A sealing strip (20) is fixedly installed on one side wall of the sealing plate (19). The valve plate (4) is rotatably installed on the inner side of the valve seat sealing ring (3) via the valve stem (10). An arc-shaped groove (21) is opened on the side wall of both ends of the valve plate (4) at the position corresponding to the sealing strip (20). The two ends of the valve plate (4) are in contact with the sealing plate (19). The sealing strip (20) is installed inside the arc-shaped groove (21).

2. A soft-seal electric butterfly valve according to claim 1, characterized in that: An installation groove is provided between the two ends of the first positioning plate (16) and the second positioning plate (17). The protrusions (18) are symmetrically fixed on the outer walls of the two ends of the valve seat sealing ring (3). The protrusions (18) are interference-fitted into the interior of the installation groove.

3. A soft-seal electric butterfly valve according to claim 2, characterized in that: The valve seat sealing ring (3) is in close contact with the positioning ring (15). The top and bottom ends of the valve seat sealing ring (3) are provided with through holes. The valve stem (10) is inserted and installed inside the through holes and the valve seat sealing ring (3).

4. A soft-seal electric butterfly valve according to claim 3, characterized in that: The valve body (1) has mounting holes at the top and bottom corresponding to the through holes. The mounting holes at the top and bottom are fixedly connected to the mounting pipe (5) and the fixing pipe (6). The two ends of the valve stem (10) are rotatably installed inside the mounting pipe (5), the fixing pipe (6) and the mounting holes.

5. A soft-seal motor-operated butterfly valve according to claim 4, characterized in that: The top end of the mounting tube (5) is fixedly mounted with a frame mounting bracket (7) by bolts. The drive mechanism (8) includes a fixed box (9), a worm gear mechanism (11) and a transparent cover (14). The fixed box (9) is fixedly mounted on the top of the frame mounting bracket (7) by screws. The top end of the valve stem (10) passes through the frame mounting bracket (7) and is located inside the fixed box (9).

6. A soft-seal motor-operated butterfly valve according to claim 5, characterized in that: A servo motor (12) is fixedly installed on the inner rear wall of the fixed box (9). The worm gear mechanism (11) includes a worm wheel and a worm. The worm is fixedly installed on the output shaft of the servo motor (12). The worm wheel is fixedly installed on the outer side of the upper end of the valve stem (10) corresponding to the inside of the fixed box (9). The worm wheel and the worm are meshed with each other.

7. A soft-seal motor-operated butterfly valve according to claim 6, characterized in that: The transparent cover (14) is fixedly installed on the top of the fixed box (9), the top of the valve stem (10) is located inside the transparent cover (14), and a pointer (13) is fixedly installed on one side of the top of the valve stem (10) corresponding to the inside of the transparent cover (14).

8. A soft-seal motor-operated butterfly valve according to claim 1, wherein: A sealing gasket is fixedly provided on the side wall of the sealing plate (19) at the position corresponding to the valve plate (4). The valve seat sealing ring (3) is composed of a soft sealing ring and multiple layers of stainless steel sheets. The top and bottom ends and the outer ring of the valve plate (4) are in contact with the inner wall of the valve seat sealing ring (3).

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